Abstract
In this paper, a new type of pick with a large size head is produced by a low-temperature bimetallic composite. The pick head is composed of 60 mm long high chromium cast iron, and the pick handle is 20# steel. They are connected by nickel-based alloy powder. The size of the bonding interface observed by SEM is approximately 1.3 mm. The pick head is mainly composed of M7C3 and M2C compounds with high wear resistance to bear the wear resistance of the pick. The pick handle with outstanding toughness bears the impact of picks. It is also worth mentioning that the impact toughness of the sample reaches 62 J/cm2 and the shear strength is 208 MPa.The hardness of the handle is about 325HV, and the pick head hardness is about 935HV. The hardness gradually increases from the pick handle to the pick head.
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